Creative makes some good DACs and their latest is looking at offering up some nice features for streamers. The Sound Blaster GC7 is a gaming DAC that gives you many controls at your fingertips.
The tilted control deck gives you two nice easily accessible knobs for voice and volume control, four programmable buttons, and quick toggling of other sound aspects.
Super X-FI support is also built in and offers up awesome expansive audio that makes it sound like you're listening to large speakers when paired with headphones. There's also Battle Mode, which can help emphasis gun shots and foot steps as well as make them more easily discernible from what direction they are coming from.
The Sound Blaster GC7 is available now for a price of $169.99 and you can order from Creative themselves.